libstdc++-v3/testsuite/27_io/basic_istream/extractors_character/wchar_t/4.cc

   1 // 2005-07-22  Paolo Carlini  <pcarlini@suse.de>
   2
   3 // Copyright (C) 2005, 2006, 2007, 2009 Free Software Foundation
   4 //
   5 // This file is part of the GNU ISO C++ Library.  This library is free
   6 // software; you can redistribute it and/or modify it under the
   7 // terms of the GNU General Public License as published by the
   8 // Free Software Foundation; either version 3, or (at your option)
   9 // any later version.
  10
  11 // This library is distributed in the hope that it will be useful,
  12 // but WITHOUT ANY WARRANTY; without even the implied warranty of
  13 // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  14 // GNU General Public License for more details.
  15
  16 // You should have received a copy of the GNU General Public License along
  17 // with this library; see the file COPYING3.  If not see
  18 // <http://www.gnu.org/licenses/>.
  19
  20 // 27.6.1.2.3 basic_istream::operator>>
  21
  22 #include <istream>
  23 #include <string>
  24 #include <fstream>
  25 #include <cstdlib>
  26 #include <testsuite_hooks.h>
  27
  28 using namespace std;
  29
  30 wstring prepare(wstring::size_type len, unsigned nchunks)
  31 {
  32   wstring ret;
  33   for (unsigned i = 0; i < nchunks; ++i)
  34     {
  35       for (wstring::size_type j = 0; j < len; ++j)
  36         ret.push_back(L'a' + rand() % 26);
  37       len *= 2;
  38       ret.push_back(L' ');
  39     }
  40   return ret;
  41 }
  42
  43 void check(wistream& stream, const wstring& str, unsigned nchunks)
  44 {
  45   bool test __attribute__((unused)) = true;
  46
  47   wchar_t* chunk = new wchar_t[str.size()];
  48   wmemset(chunk, L'X', str.size());
  49
  50   wstring::size_type index = 0, index_new = 0;
  51   unsigned n = 0;
  52
  53   while (stream >> chunk)
  54     {
  55       index_new = str.find(' ', index);
  56       VERIFY( !str.compare(index, index_new - index, chunk) );
  57       index = index_new + 1;
  58       ++n;
  59       wmemset(chunk, L'X', str.size());
  60     }
  61   VERIFY( stream.eof() );
  62   VERIFY( n == nchunks );
  63
  64   delete[] chunk;
  65 }
  66
  67 // istream& operator>>(istream&, charT*)
  68 void test01()
  69 {
  70   const char filename[] = "inserters_extractors-4.txt";
  71
  72   const unsigned nchunks = 10;
  73   const wstring data = prepare(666, nchunks);
  74
  75   wofstream ofstrm;
  76   ofstrm.open(filename);
  77   ofstrm.write(data.data(), data.size());
  78   ofstrm.close();
  79
  80   wifstream ifstrm;
  81   ifstrm.open(filename);
  82   check(ifstrm, data, nchunks);
  83   ifstrm.close();
  84 }
  85
  86 int main()
  87 {
  88   test01();
  89   return 0;
  90 }